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divergent series 【數學】發散級數。

divergent squint

Definition the infinite series converges and has sum if the sequence of partial sums converges to , that is . if diverges , then the series diverges . a divergent series has no sum 定義如果級數的部分和數列有極限,即,則稱無窮級數收斂,這時極限叫做這級數的和,并寫成;如果沒有極限,則稱無窮級數發散。